Accessory Drive Belts

These vehicles are equipped with an belt tensioner which coordinates belt tension automatically and does not need manual adjustment. With the belt installed, check that the mark on the belt tensioner is with the -B- range as shown in the illustration.

Fig. To ensure proper belt tension, check that the mark is within the -B- range as shown

5VZ-E Engine

Alternator: New-160 lbs. (712 N) Used-100 lbs. (445 N)

Power Steering: New-158 lbs. (702 N) Used-103 lbs. (458 N)

Air Conditioning: New-160 lbs. (712 N) Used-100 lbs. (445 N)

NOTE

This engine uses three individual accessory drive belts, identified as the Alternator drive belt, A/C drive belt and Power Steering pump drive belt. The adjustment procedure is the same for all.

Inspect the drive belt for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately.

Visually check the belt for excessive wear and frayed cords. Cracks on the rib side of a belt are considered acceptable. If the belt has chunks missing from the ribs, it should be replaced. If any defect has been found, replace the drive belt. Ensure the belt fits properly in the ribbed grooves. Check with your hand to confirm that the belt has not slipped out of the groove on the bottom of the pulley.

Fig. Examples of excessive wear and chunks missing from the ribs of the accessory drive belt

Fig. Check to ensure the accessory drive belt is seated properly on the pulley.

Removal & Installation

1gr-FE And 2uz-FE Engines

Loosen the belt tension by turning the belt tensioner counterclockwise, and remove the accessory drive belt.